Open Source Base44 Alternatives
A curated collection of the 2 best open source alternatives to Base44.
The best open source alternative to Base44 is Onlook. If that doesn't suit you, we've compiled a ranked list of other open source Base44 alternatives to help you find a suitable replacement. Other interesting open source alternative to Base44 is Budibase.
Base44 alternatives are mainly Frameworks & Platforms. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Base44.
Visual editor for Next.js and Tailwind projects, letting designers edit the live DOM while real source code changes underneath.
Designers working on top of a codebase usually hand mockups to engineers and wait. Onlook closes that gap with an open source visual-first code editor where changes made in the browser DOM land directly in Next.js and TailwindCSS source, positioning itself against Bolt.new, Lovable, V0, Replit Agent, Figma Make and Webflow.
Under the surface, project code loads into a web container that serves it, the preview appears in an iFrame, and the code is indexed and instrumented so every element maps back to its place in the source. Edits apply to the iFrame first and then to the code. The stack is Next.js with tRPC, Supabase and Drizzle for data, the AI SDK over OpenRouter for models, and Bun for the monorepo.
The editor covers the span between a blank project and a deployed site.
- Project creation: Start a Next.js app from text, an image or a prebuilt template.
- Visual canvas: Browse layers, manage brand assets and tokens, and preview the app in real time.
- Code access: A real-time editor sits beside the design, with checkpoints to save and restore.
- Branching: Try alternative designs without disturbing the main line of work.
- Deployment: Generate a shareable link or point a custom domain at the result.
Onlook runs on any Next.js and TailwindCSS project, imported or started from scratch, through the hosted app or locally. Support for other frameworks and non-Tailwind projects remains open work.
Operations platform for building internal apps, automations and AI agents on top of the databases a business already runs.
Every company accumulates the same pile of requests: employees asking questions, requesting approvals and reporting issues. The tooling that answers them usually gets stitched together from several separate products. Budibase puts the apps, the automations and the agents on one platform instead.
Its agents do more than reply. They run workflows across the business, creating records, routing approvals, updating apps and notifying teams, wired into the databases, AI models and business systems already in use.
The platform covers the parts an internal tool normally needs.
- Apps and automations: build the interfaces and the workflows behind them without assembling separate builders.
- Data connections: integrate databases, AI models and business apps so agents and automations can act across operations.
- Public API: use Budibase as a backend, with an API key, a published spec and interactive reference documentation for building integrations on top.
- User management: manage users, onboarding, SMTP, apps, groups and theming globally, then hand group administration to a group manager.
- Self-hosting: deploy with Docker, Docker Compose, Kubernetes, DigitalOcean or Portainer on infrastructure you already own.
A single ARM compatible Docker image covers the simplest install, and Budibase Cloud exists for teams that would rather not run anything. It suits engineering teams tired of building the same approval flow and admin panel from scratch, and the documentation and GitHub discussions carry the rest.
